Packed: 6pcs mini finger mountain bikes?6 different color? with brake ropes and Double-bar. In addition, please use a screwdriver to adjust the tightness of the wheels and replace the extra wheels. Size: each bicycle is 11 cm in length and 8 cm in height, weight: 22.7g/pcs. Toy and Gifts: can be used as an ornament, can also be used for boys' birthday parties, such as decorating cakes and parties, etc. It can also be given as a birthday or holiday gift to children. Function: Exercise hand coordination: the mini finger bikes are disassemble and reconfigurable, can help to exercise hand coordination and enhance attention ability, making your finger more flexible while relaxing yourself from busy work or study. Best customer service: If you have any questions, please contact us as soon as possible, we will always be at your side to help you, do not hesitate to buy!